Loosening Rusty Bolts

[TNhobbyfarmer]

I bought a used box blade a few months back. It had been setting out for quite a while, but was in pretty good shape and seems to be fairly heavy duty. One of the lift arm pins is bent so I proceeded to TRY to take it off and replace it. I have messed with some pretty onery rusty nuts and bolts before and have always managed to get them busted free, that is before this one. What do you guys find is best to put on old rusty bolts to assist in breaking them free? This one has got me bumfuzzled.

 

[Pooh_Bear]

Spray it with liquid wrench. Let it soak. Spray it some more.
If after a few days of this routine it still doesn't come off,
then heat the nut with a propane torch. Not the pin, just the nut.
The nut will expand and loosen its grip so you can remove it.

Sometimes you can spray it with liquid wrench,
then put a box end wrench on it and whack the wrench with a hammer
a few times to mimic the force of an impact wrench.

Pooh Bear

 

[higgy]

Pins and nuts are cheap.

Hit it with an oxyacetylene torch with an #4 rosebud.

Get the nut good and hot, remove, do not touch.

Replace pin and nut, use antisize when reassembling.

 

[George2615]

I have always found if you are able to use a torch and heat the nut cherry red it will usually come right off. Then replace with new ones. If no torch is available then go with PB Blaster or CRC for rusty bolts and pray. Sometimes a sharp blow / rap with a hammer will free them up too.

 

[cast_and_blast]

I've used Liquid Wrench but I like "Deep Creep" better. Same idea...

Scott

 

[biker128pedal]

I have found PB Blastor works best. Spray and let it soak for a few hours then spray again. Try removing without heat. I have reused gate hinge bolts that have sat out in the weather for over 15 years and rusted.

Mike

 

[bones1]

Wouldn't be without my PB blaster and Kroil.Good stuff.

 

[Theowegian]

Kroil is some of the best. I swear by it.

 

[PineRidge]

You can also use a SawZall to cut it off. Ain't nearly as much fun as the fire though.

 

[Dargo]

I'm rebuilding a 1920's era culti-packer and several of the bolts have never been off. I broke the last of my junk Pittsburgh wrenches on them and then got out my 'one size fits all' plasma wrench. Since I did not want to heat up other parts on the antique, the plasma cutter did a great job of a precision cutting without heating up the surrounding areas. If you have one, that would be my first choice for those stubborn (and frozen) nuts on rusted bolts.